WorksheetsPeriodic classification of elements
Total questions: 22
Worksheet time: 11mins
At the time of Mendeleev, the number of elements known was
(a) 63
(b) 65
(c) 62
(d) 64
The properties of eka-aluminium predicted by Mendeleev are the same as the properties of later discovered element
(a) Scandium
(b) Germanium
(c) Gallium
(d) Aluminium
An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?
(a) 4th group
(b) 6th group
(c) 3rd group
(d) 2nd group
The arrangement of elements in the Modem Periodic Table is based on their
(a) increasing atomic mass in the period
(b) increasing atomic number in the horizontal rows
(c) increasing atomic number in the vertical columns
(d) increasing atomic mass in the group
Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
(a) Group 8
(b) Group 2
(c) Group 18
(d) Group 10
Element ‘X’ forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same group of the periodic table as:
(a) Si
(b) Mg
(c) Al
(d) Na
Pick out the chemically most reactive elements from the given triads.Li, Na, K F, Cl, Br
(a) Li and F
(b) Li and Br
(c) K and F
(d) K and Br
A metal ‘M’ is in the first group of the Periodic Table. What will be the formula of its oxide?
(a) MO
(b) M2O
(C) M2O3
(d) MO2
Name the neutral atom in the Periodic Table which has the same number of electrons as K+ and Cl-.
(a) Helium
(b) Argon
(c) Neon
(d) Krypton
An element ‘A’ belongs to the third period and group 16 of the Periodic Table. Find out the valency of A.
(a) Valency = 6
(b) Valency = 2
(c) Valency = 1
(d) Valency = 3
Which of the following set of elements is written in order of their increasing metallic character?
(a) Na Li K
(b) C Q N
(c) Mg Al Si
d) Be Mg Ca
The atom of an element has electronic con-figuration 2, 8, 7. To which of the following elements would it be chemically similar?
(a) N(7)
(b) P(15)
(c) Na(11)
(d) F (9)
Upto which element, the Law of Octaves was found applicable?
CALCIUM
MAGNESIUM
ALUMINIUM
POTASSIUM
EKABORON , EKA ALUMINIUM AND EKA SILICON REPRESENT WHICH OF THE FOLLOWING SETS OF ELEMENTS?
SCANDIUM,GALLIUM,GERMANIUM
GERMANIUM, SCANDIUM,GALLIUM,
GALLIUM,SCANDIUM ,GERMANIUM
GALLIUM,GERMANIUM, SCANDIUM
Which of the following belong to same period?
Element A B C D E
Atomic No 3 2 14 9 6
DEA
BCD
ABC
ADE
Which one of the following statements is not correct about the trends in the properties of the elements of a period on going from left to right?
oxides become more acidic
the atom gains electrons readily
the element becomes more metallic
there is increase in no of valence electrons
Which of the following set of elements are arranged in increasing order of non metallic character?
F, Cl ,Br
Br, Cl ,F
Cl, F, Br
Br, F ,Cl
Halogens belong to __________ group of periodic table
12
13
17
18
Electronegative character ________ down the group
increases
decreases
no change
Non metals are situated on the _____________ side of the periodic table.
left
right
centre
Which one of the following does not increase while moving down the group of the periodic table?
Atomic radius
Metallic character
Valency
Number of shells in an element.
According to Modern periodic law, the properties of elements are the periodic functions of 'X' ; Identify 'X'.
Atomic no of elements
Atomic mass of elements
Atomic volumes of elements
Atomic densities of elements
